20720080

素因数分解:

$2^4\times 5^1\times {\mathrm{259001}}^1$

素因数の和:259014

約数の個数: 20

約数和(自身を含む): 48174372

約数和(自身を除く): 27454292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 259001, 518002, 1036004, 1295005, 2072008, 2590010, 4144016, 5180020, 10360040, 20720080]

約数ペア:

[(1, 20720080), (2, 10360040), (4, 5180020), (5, 4144016), (8, 2590010), (10, 2072008), (16, 1295005), (20, 1036004), (40, 518002), (80, 259001)]